235
FNCA52 TJSJ 211930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST TUE APR 21 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-220800-
SOUTHEAST COASTAL PLAINS-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 10 40
TEMP (24H TREND) 67 (-4) 87 (+1) 67 87
RH % (24H TREND) 91 (+6) 43 (-10) 87 43
WIND 20FT/EARLY(MPH) NE 8 E 9 NE 11 NE 5
WIND 20FT/LATE(MPH) NE 8 SE 13 NE 8 E 5
MIXING HGT(FT-AGL/MSL) 5800 3790
TRANSPORT WND (MPH) NE 7 E 6
VENT RATE (KT-FT) 34800 18950
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-220800-
SOUTHERN HILLS-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 40 10 50
TEMP (24H TREND) 64 (-5) 83 (+2) 64 83
RH % (24H TREND) 97 (+9) 56 (-7) 95 57
WIND 20FT/EARLY(MPH) NE 8 NE 9 NE 11 LGT/VAR
WIND 20FT/LATE(MPH) NE 8 E 11 NE 6 E 6
MIXING HGT(FT-AGL/MSL) 6290 3440
TRANSPORT WND (MPH) NE 7 E 7
VENT RATE (KT-FT) 37740 20640
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-220800-
NORTH COASTAL PLAINS-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10 30
TEMP (24H TREND) 68 (-3) 86 (0) 67 86
RH % (24H TREND) 97 (+7) 54 (-6) 95 56
WIND 20FT/EARLY(MPH) NE 11 E 9 NE 11 E 6
WIND 20FT/LATE(MPH) E 10 NE 13 E 9 E 10
MIXING HGT(FT-AGL/MSL) 5230 3220
TRANSPORT WND (MPH) E 9 E 8
VENT RATE (KT-FT) 41840 22540
DISPERSION 5 5
DSI 4 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-220800-
NORTHERN HILLS-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 10 40
TEMP (24H TREND) 65 (-3) 85 (+1) 65 84
RH % (24H TREND) 98 (+7) 56 (-5) 96 58
WIND 20FT/EARLY(MPH) NE 10 E 9 E 10 E 6
WIND 20FT/LATE(MPH) E 10 NE 11 E 8 E 9
MIXING HGT(FT-AGL/MSL) 5810 2950
TRANSPORT WND (MPH) E 8 E 7
VENT RATE (KT-FT) 40670 17700
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-220800-
WEST COAST-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 20 50 10 50
TEMP (24H TREND) 68 (-2) 87 (+1) 66 87
RH % (24H TREND) 96 (+8) 55 (-6) 93 55
WIND 20FT/EARLY(MPH) NE 12 E 10 NE 13 E 8
WIND 20FT/LATE(MPH) E 12 SW 12 E 11 E 11
MIXING HGT(FT-AGL/MSL) 5480 3150
TRANSPORT WND (MPH) E 6 E 9
VENT RATE (KT-FT) 27400 25200
DISPERSION 5 5
DSI 4 5 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-220800-
EASTERN INTERIOR-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 10 40
TEMP (24H TREND) 66 (-4) 84 (+1) 65 84
RH % (24H TREND) 97 (+7) 56 (-5) 95 57
WIND 20FT/EARLY(MPH) NE 8 NE 9 NE 10 E 5
WIND 20FT/LATE(MPH) NE 8 NE 10 NE 8 E 6
MIXING HGT(FT-AGL/MSL) 6650 3380
TRANSPORT WND (MPH) NE 8 E 7
VENT RATE (KT-FT) 46550 20280
DISPERSION 5 5
DSI 2 6 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-220800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 30 0 40
TEMP (24H TREND) 64 (-4) 80 (+2) 64 80
RH % (24H TREND) 97 (+4) 59 (-8) 96 61
WIND 20FT/EARLY(MPH) NE 6 NE 6 NE 6 LGT/VAR
WIND 20FT/LATE(MPH) NE 5 NE 8 NE 5 E 5
MIXING HGT(FT-AGL/MSL) 5160 3350
TRANSPORT WND (MPH) NE 8 E 8
VENT RATE (KT-FT) 36120 23450
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-220800-
CENTRAL MOUNTAIN RANGE-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 20 50 10 50
TEMP (24H TREND) 62 (-4) 83 (+4) 62 83
RH % (24H TREND) 99 (+8) 58 (-6) 98 60
WIND 20FT/EARLY(MPH) NE 10 E 8 NE 10 E 5
WIND 20FT/LATE(MPH) E 10 NE 11 E 8 E 10
MIXING HGT(FT-AGL/MSL) 7090 3070
TRANSPORT WND (MPH) NE 5 SE 6
VENT RATE (KT-FT) 28360 15350
DISPERSION 5 5
DSI 2 6 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-220800-
CAYEY MOUNTAIN RANGE-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10 30
TEMP (24H TREND) 64 (-4) 80 (+1) 64 80
RH % (24H TREND) 98 (+5) 60 (-5) 96 61
WIND 20FT/EARLY(MPH) NE 6 NE 8 NE 10 LGT/VAR
WIND 20FT/LATE(MPH) NE 5 E 10 NE 5 LGT/VAR
MIXING HGT(FT-AGL/MSL) 5930 3220
TRANSPORT WND (MPH) NE 8 E 8
VENT RATE (KT-FT) 41510 22540
DISPERSION 5 5
DSI 2 6 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-220800-
VIEQUES-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY CLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 30 0 40
TEMP (24H TREND) 71 (-4) 85 (0) 71 85
RH % (24H TREND) 84 (+3) 53 (-4) 83 54
WIND 20FT/EARLY(MPH) NE 11 NE 9 NE 11 E 6
WIND 20FT/LATE(MPH) NE 11 NE 9 NE 10 E 8
MIXING HGT(FT-AGL/MSL) 4420 3990
TRANSPORT WND (MPH) NE 10 E 8
VENT RATE (KT-FT) 39780 27930
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-220800-
CULEBRA-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY CLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 30 0 40
TEMP (24H TREND) 73 (-3) 85 (-1) 73 86
RH % (24H TREND) 83 (+3) 52 (-6) 83 54
WIND 20FT/EARLY(MPH) NE 11 E 9 NE 11 E 6
WIND 20FT/LATE(MPH) NE 11 NE 8 NE 10 E 8
MIXING HGT(FT-AGL/MSL) 4370 3570
TRANSPORT WND (MPH) E 9 E 8
VENT RATE (KT-FT) 34960 24990
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-220800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 30 50 10 40
TEMP (24H TREND) 67 (-4) 88 (+2) 67 88
RH % (24H TREND) 96 (+16) 42 (-11) 86 44
WIND 20FT/EARLY(MPH) NE 11 E 11 NE 14 E 9
WIND 20FT/LATE(MPH) NE 12 SE 11 NE 13 E 9
MIXING HGT(FT-AGL/MSL) 5870 3860
TRANSPORT WND (MPH) E 5 E 8
VENT RATE (KT-FT) 23480 27020
DISPERSION 5 4
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-220800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY CLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 20 0 30
TEMP (24H TREND) 72 (-4) 85 (+1) 72 85
RH % (24H TREND) 85 (+6) 52 (-6) 83 53
WIND 20FT/EARLY(MPH) NE 11 NE 9 NE 11 E 9
WIND 20FT/LATE(MPH) NE 11 NE 9 NE 10 E 9
MIXING HGT(FT-AGL/MSL) 4310 3670
TRANSPORT WND (MPH) E 10 E 10
VENT RATE (KT-FT) 38790 33030
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-220800-
ST CROIX-
330 PM AST TUE APR 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY MCLEAR CLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 20 0 40
TEMP (24H TREND) 71 (-4) 86 (+1) 71 86
RH % (24H TREND) 89 (+8) 53 (-8) 84 55
WIND 20FT/EARLY(MPH) NE 11 NE 9 NE 10 E 8
WIND 20FT/LATE(MPH) NE 11 NE 10 NE 10 E 8
MIXING HGT(FT-AGL/MSL) 4820 4290
TRANSPORT WND (MPH) NE 10 E 9
VENT RATE (KT-FT) 43380 34320
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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